CVSROOT: /cvs
Module name: src
Changes by: chel...@cvs.openbsd.org 2021/05/11 07:29:25
Modified files:
share/man/man9 : timeout.9
sys/kern : kern_timeout.c
Log message:
timeout_barrier(9), timeout_del_barrier(9): remove kernel lock
In timeout_barrier(9) we take/release the kernel lock to ensure that the
given timeout has finished running (if it had been running at all).
This approach is inefficient. If we put a barrier timeout on the
queue and wait for it to run in cond_wait(9) we can block instead of
spinning for the kernel lock. We already do this for process-context
timeouts in timeout_barrier(9) anyway.
Discussed with dlg@, visa@, and mpi@.
ok dlg@
